[ 11.462345][ T260] ip (260) used greatest stack depth: 24528 bytes left [ 16.231317][ T335] 8021q: 802.1Q VLAN Support v1.8 [ 16.601712][ T340] gre: GRE over IPv4 demultiplexor driver [ 16.657273][ T340] ip6_gre: GRE over IPv6 tunneling driver [ 16.851300][ T343] ip (343) used greatest stack depth: 24016 bytes left [ 25.962915][ T415] GACT probability NOT on [ 43.270949][ T632] [ 43.271107][ T632] ============================================ [ 43.271298][ T632] WARNING: possible recursive locking detected [ 43.271483][ T632] 6.13.0-rc5-virtme #1 Not tainted [ 43.271637][ T632] -------------------------------------------- [ 43.271836][ T632] ip/632 is trying to acquire lock: [ 43.271984][ T632] ffffffff94dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.272310][ T632] [ 43.272310][ T632] but task is already holding lock: [ 43.272553][ T632] ffffffff94dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.272871][ T632] [ 43.272871][ T632] other info that might help us debug this: [ 43.273135][ T632] Possible unsafe locking scenario: [ 43.273135][ T632] [ 43.273355][ T632] CPU0 [ 43.273468][ T632] ---- [ 43.273607][ T632] lock((netdev_chain).rwsem); [ 43.273766][ T632] lock((netdev_chain).rwsem); [ 43.273921][ T632] [ 43.273921][ T632] *** DEADLOCK *** [ 43.273921][ T632] [ 43.274139][ T632] May be due to missing lock nesting notation [ 43.274139][ T632] [ 43.274355][ T632] 2 locks held by ip/632: [ 43.274471][ T632] #0: ffffffff94de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 43.274749][ T632] #1: ffffffff94dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.275070][ T632] [ 43.275070][ T632] stack backtrace: [ 43.275265][ T632] CPU: 2 UID: 0 PID: 632 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 43.275497][ T632] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 43.275683][ T632] Call Trace: [ 43.275816][ T632] [ 43.275896][ T632] dump_stack_lvl+0x82/0xd0 [ 43.276051][ T632] print_deadlock_bug+0x40a/0x650 [ 43.276199][ T632] validate_chain+0x5bf/0xae0 [ 43.276358][ T632] ? __pfx_validate_chain+0x10/0x10 [ 43.276510][ T632] ? hlock_class+0x4e/0x130 [ 43.276658][ T632] ? mark_lock+0x38/0x3e0 [ 43.276778][ T632] __lock_acquire+0xb9a/0x1680 [ 43.276930][ T632] lock_acquire.part.0+0xeb/0x330 [ 43.277082][ T632] ? blocking_notifier_call_chain+0x50/0x90 [ 43.277266][ T632] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 43.277455][ T632] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.277612][ T632] ? trace_lock_acquire+0x14c/0x1f0 [ 43.277764][ T632] ? lock_acquire+0x32/0xc0 [ 43.277914][ T632] ? blocking_notifier_call_chain+0x50/0x90 [ 43.278105][ T632] down_read+0x9f/0x340 [ 43.278220][ T632] ? blocking_notifier_call_chain+0x50/0x90 [ 43.278403][ T632] ? __pfx_down_read+0x10/0x10 [ 43.278551][ T632] ? __lock_release+0x103/0x460 [ 43.278698][ T632] ? netconsole_netdev_event+0x2c1/0x620 [ 43.278850][ T632] ? __pfx___lock_release+0x10/0x10 [ 43.279001][ T632] blocking_notifier_call_chain+0x50/0x90 [ 43.279153][ T632] __netdev_upper_dev_unlink+0xd9/0x220 [ 43.279303][ T632] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 43.279487][ T632] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 43.279636][ T632] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 43.279828][ T632] ? rtnl_is_locked+0x15/0x20 [ 43.280004][ T632] netdev_upper_dev_unlink+0x71/0xa0 [ 43.280153][ T632] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 43.280350][ T632] ? netconsole_netdev_event+0x2c1/0x620 [ 43.280498][ T632] ? mutex_is_locked+0x1c/0x60 [ 43.280674][ T632] ? rtnl_is_locked+0x15/0x20 [ 43.280846][ T632] ? netdev_master_upper_dev_get+0x13/0x120 [ 43.281030][ T632] vrf_device_event+0x78/0xe0 [vrf] [ 43.281186][ T632] notifier_call_chain+0xcd/0x150 [ 43.281343][ T632] blocking_notifier_call_chain+0x66/0x90 [ 43.281499][ T632] unregister_netdevice_many_notify+0xa7b/0x1580 [ 43.281699][ T632] ? __lock_release+0x103/0x460 [ 43.281855][ T632] ? __pfx___lock_release+0x10/0x10 [ 43.282016][ T632] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 43.282205][ T632] ? hlock_class+0x4e/0x130 [ 43.282355][ T632] ? mark_held_locks+0x9e/0xe0 [ 43.282504][ T632] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 43.282665][ T632] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 43.282869][ T632] rtnl_dellink+0x348/0xa40 [ 43.283020][ T632] ? __pfx_rtnl_dellink+0x10/0x10 [ 43.283180][ T632] ? find_held_lock+0x2c/0x110 [ 43.283333][ T632] ? __lock_release+0x103/0x460 [ 43.283481][ T632] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 43.283631][ T632] ? __pfx___lock_release+0x10/0x10 [ 43.283795][ T632] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.283947][ T632] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 43.284096][ T632] ? __pfx_rtnl_dellink+0x10/0x10 [ 43.284246][ T632] rtnetlink_rcv_msg+0x712/0xc10 [ 43.284395][ T632] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 43.284542][ T632] ? hlock_class+0x4e/0x130 [ 43.284689][ T632] ? mark_lock+0x38/0x3e0 [ 43.284814][ T632] ? __lock_acquire+0xb9a/0x1680 [ 43.284972][ T632] netlink_rcv_skb+0x130/0x360 [ 43.285124][ T632] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 43.285296][ T632] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 43.285448][ T632] ? netlink_deliver_tap+0x13e/0x340 [ 43.285598][ T632] ? netlink_deliver_tap+0xc3/0x340 [ 43.285749][ T632] netlink_unicast+0x44b/0x710 [ 43.285915][ T632] ? __pfx_netlink_unicast+0x10/0x10 [ 43.286064][ T632] ? find_held_lock+0x2c/0x110 [ 43.286216][ T632] netlink_sendmsg+0x723/0xbe0 [ 43.286365][ T632] ? __pfx_netlink_sendmsg+0x10/0x10 [ 43.286517][ T632] ____sys_sendmsg+0x7ac/0xa10 [ 43.286665][ T632] ? __pfx_____sys_sendmsg+0x10/0x10 [ 43.286818][ T632] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 43.287013][ T632] ___sys_sendmsg+0xee/0x170 [ 43.287162][ T632] ? __pfx____sys_sendmsg+0x10/0x10 [ 43.287312][ T632] ? kasan_save_stack+0x34/0x50 [ 43.287461][ T632] ? kasan_save_stack+0x24/0x50 [ 43.287611][ T632] ? __kasan_record_aux_stack+0x8e/0xa0 [ 43.287770][ T632] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 43.287957][ T632] ? __x64_sys_close+0x7c/0xd0 [ 43.288115][ T632] ? do_syscall_64+0xc1/0x1d0 [ 43.288267][ T632] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.288453][ T632] ? __lock_acquire+0xb9a/0x1680 [ 43.288603][ T632] ? find_held_lock+0x2c/0x110 [ 43.288753][ T632] ? __lock_release+0x103/0x460 [ 43.288908][ T632] ? __virt_addr_valid+0x22b/0x430 [ 43.289062][ T632] ? __pfx___lock_release+0x10/0x10 [ 43.289210][ T632] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.289370][ T632] __sys_sendmsg+0x109/0x1a0 [ 43.289520][ T632] ? __pfx___sys_sendmsg+0x10/0x10 [ 43.289668][ T632] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 43.289868][ T632] do_syscall_64+0xc1/0x1d0 [ 43.290019][ T632] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.290203][ T632] RIP: 0033:0x7fcc3995e9a7 [ 43.290360][ T632] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 43.290892][ T632] RSP: 002b:00007ffe2f971928 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 43.291117][ T632] RAX: ffffffffffffffda RBX: 00007ffe2f972050 RCX: 00007fcc3995e9a7 [ 43.291347][ T632] RDX: 0000000000000000 RSI: 00007ffe2f971990 RDI: 0000000000000005 [ 43.291568][ T632] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 43.291800][ T632] R10: 00007fcc3981cef8 R11: 0000000000000246 R12: 0000000000000002 [ 43.292021][ T632] R13: 0000000067795788 R14: 0000000000498600 R15: 0000000000000000 [ 43.292250][ T632] [ 43.322297][ T632] ip (632) used greatest stack depth: 23712 bytes left